Power-transmitting apparatus



Sept, 14, 1926. 1,600,117

' D. LAKE POWER TRANSMITTING APPARATUS Filed Jan. 14, 1922 4Sheets-Sheet 1 Sept. 14 1-926. 1,600,117

D. LAKE POWER TRANSMITTING APPARATUS Filed'Jan. 14, 1922 4 Sheets-Sheet2 Sept. '14 1926.

D. LAKE POWER TRANSMITTING APPARATUS Filed Jan. 14, 1922 4 SheetS- Sheet5 Sept. 14 1926. 1,600,117 v D. LAKE POWER TRANSMITTING APP$ATUS Flle dJan.

gig

. Imp-w Patented Sept. 14, 1926.

UNITED STATES PATENT OFFICE.

DAVID LAKE. or CLEVELAND, OHIO.

POWER-TRANSMITTIN G APPARATUfi Application filed January 14, 1922 Serialno. 529,159.

mitting member and consequent deforma tion-in the latter under theinfluence of the torque caused by the transmission of power to such adegree that further slippage is prevented. At this point there'is norelative motion between the driving and driven members.

This case is a continuation, as to all common subject matter, ofapplication Serial No. 397,062, filed July 17, 1920;

In the accompanying drawings:

Fig. 1 is a longitudinal sectional view of my improved powertransmitting apparatus, the section being on the line 1-1, Fig. 2;

rection of the arrow 1, Fig. 1, with a part of the driving member insection and showing the shoes in contact with the transmitting member;

transmittig apparatus similar to Fig. 2 and showing the shoes out ofcontact with the transmitting member; K

Fig. 4 is a perspective view of the hub;

Fig. 5 is a perspective view of the compensating ring;

Fig. 6 is a detached perspective view of one of the shoes;

Fig. 7 is a detached perspective view of the shifting spool";

Fig. 8 is a perspective view of one of the cam rods;

Fig. 9 is a sectional view on the line99, Fig. 1; and

Fig. 10 is a view illustrating my invention applied to a powertransmitting apparatus usin aflat disk.

While my invention is illustrated as ap- Fig. 2 is a face View lookingin the-di-' Fig. 3 is a view of a portion of the power plied to what iscommonly termed a clutch, it will be understood that it is not limitedto this particular. application, as it- IS in whole or in partapplicable to a variety of apparatus for transmitting power.

Referrin to the drawingsfl is a shaft, which, in the present instance,is the driven member. bushing 2 having a chamber 3 for lubricant andhaving a series of perforations 4 to lubricate the bearing of the-hub 6of the belt wheel 5, which is the driving member. This driving member isfreeto' rotate on the bushing. The bushing is held to the shaft, in thepresent instance, by a set screw 7 and the driving member is confinedagainst longitudinal movement by'a shoulder on one Secured'to the shaftis a hollow end of the bushing and by the hub '8, which is secured tothe shaft 1 by a key 9 and forms part of the driven member. Projectingfrom the driving member 5 is an annu lar'flange 10. This flange isrecessed at 11,

in the present instance, toreceivethe transmitting member 12. Thistransmitting member 1s loosely mounted in the recess so that it forms afloating member.- This member may be of any composition that will form-aresilient mass; Practical exfabric, which is factory lresults.

Pro ecting from the hub; 8 are four .studs eriments have proven that acore of ruber located between twostrips of'pottonvulcanized, producessati's- 16. Mounted on each stud is ashoe 17,

shaped as shown in Fig. 6, and havingb a wide, curved bearing surface18, prefera ly of the width of the transmitting member.

' On each shoe is a pin19, which projects into a slot 20 in acompensating ring 21 loosely mounted on the hub 8. This ring,

while 'free to turn on the hub, has its movement 7 limited by tworollers 22, mounted upon studs, which are carried by lugs 23 on the ring21. Each of the two rollers comes in contactwith a cam rod 24. The camrods extend through openings 25in the hub and are attached toprojections 26 on a shifting spool 27, loosely mounted on the shaft -1.This spool is grooved, as at 28, to receive the portions ofa shiftinglever, which is used to move the spool longitudinally on the shaft. Eachcam rod is made as shown in Fig. 8 and has a tapered portion 29 againstwhich the'roller 22 comes in contact.) Beyond this taperedportion 29 isa flat portion and separating the .two portions is a slight shoulder 31.

When the shifting spool is in the position shown in Fig. 1, then therollers are in the deep portions of the cam rods 24-. When the shiftingspool 27 is moved away from the hub 8., then the tapered portions 29 ofthe rods act to turn the compensating ring so ,as to withdraw the shoesclear of the transmitting member. tinned movement of the shifting spool,the

shoulder 31, on each cam rod, passes its roller. These rollers finallyrest on the flat surfacesBO of their correspondingrods, the

, shoulders 31'positively holding the ring 21 against accidental orunintended rotation, and hence, holding the shoes out of action asillustrated in Fig. 3. v

' 32 are two springs, which engage pins 33 on the compensating ring 31and pins 34 on thehub. These springs tend to turn the ring 21 and movethe shoes into contact with the transmitting member, but, on the reversemovement of the shifting spool, the parts moved towards the hub 8. Thismovement permits the shoes 17 to travel outwardly,

I the curvilinear surface of each shoe engagsame time the transmittining the cylindrical surface of the transmitting member. As the shoes arearranged 'eccentrically in. respect-to the transmitting member, thefriction between. each shoe and the transmitting member is sufficientlygreat to carry the shoes stillfa'rtherinto engagement with thetransmitting member, but the tendency of the transmitting member is torotate each shoe on its fulcrum. At. the member is pressed against thesurface 0 the flange of the driving member.

The actual engagement of the shoes and actual distance they can rotateon their fulcrums are controlled by the o crating mechanism as the shoesare rotate by the power of the wheel and not by the. force exerted bythe operator. v

The shoes are imbedded in the transmitting member to an extent varyingin degree with the degree to which such motion of the shoes is permittedby. the operator. As the wheel rotates, while the hub carrying the shoesstands still before the mechanism begins to function, this indentationis compelled to'progress in a circle and the character of the materialof the transmitting On the contation of the member carrying the shoesormation will determine the length of time required until a condition isreached where the driving and driven members rotate at the same speed.

There may be a slight rotary progressive movement proper in the variousportions of the transmitting member, and, in additioi thereto, a wavemotion, whereby the material directly adjacent to, or under each shoe,is pushed away to both ends to make an indentation. As soon as, a shoepasses a given point the depression fills up immediately with theidentical material in place before depressiona new, depression iscreated ahead, of the first one and eliminated-a third depression ismade, and so on, all*' around the circle. Y

The design of the shoes may be altered to allow for a sudden or slowenga ement. In the transmission of power, the oad is constantly varyingto a greater or less degree, the transmitting'member having more or lessof a cushion efiect absorbs these vibrations. It is the results of thesevibrations that permit the withdrawal of the shoes from contact with.the transmitting member with minimum effort.

Where circumstances require, constant romakes it' the driver instead ofthedriven member. e

In the drawings, the invention is illustra- ,ted as applied to a-clutchpulley and the shifting-spool 27 is moved by the operator in bothdirections. When the invention is 109 applied to a motor car, forinstance, the foot pedalmay be arranged to draw the clutch out of theengaging position, while a spring will act to throw the clutch intoengaging position. In this latter case, the control cam, which causes amovement of the comensating ring, is modified so as to have no ockedposition.

While the transmitting member is described as being made in a particularmanner, it will be understood that this. transmitting member may bemodified considerably without departing from the main feature of theInvention, which is to make said memher so that it can .be deformed whenpower- 18 applied, but which 'will return to its normal position whenthe device is not transmlttin power.

In fig. 10, the invention is shown applied to a disk clutch. On thedriving member 5 120 is a cushioned pad12", which forms the transmlttingmember.. The shoes 17 are pivotally mounted in sockets in'the drivinghub 8, secured to the shaft 1.

21 designates a compensating ring and '32 designates the engagingspring. The

designates a collar on the shifting sleeve, which may be engaged by alever, or other shifting means. On the transmission case 36 is abrakelining 35, against which the shifting sleeve comes in contact whenreversed. r

In some of the claims I have referred to the shoes as carried by thedriven member. but it will be understood that when the member carryingthe shoes is the driving member, then the wheel becomes the drivenmember. My claims are drawn to cover the construction illustratedregardless of which member is actually driven.

I claim: r

1. The combination in a power transmission, of driving and drivenmembers; segmental elements carried by one of said members;compressible, resilient material between the segmental elements and theoppo-'- site drivingor driven members; and means for actuating. saldsegmental elements to cause them to'engage and deform the com-'pressible, resilient material. I A

"2. Thecombination in a power transmission, of driving and drivenmembers; a floating pad of compressible, resilient material; and movablemeans on one of said members for, engaging and deforming the pad so-thatthe resistance to such deformation' supplies the transmitting energy.

3. The combination in a power transmis-.

sion, of a driving member; a driven member; a floating transmittingmember; means whereby contact is made between the driving member and thefloating member, and the floating member and the driven member; andsegmental means for deforming the floating transmitting member to theextent necessary to transmit the load.

4. The combination in a power transmission, of driving and drivenmembers; shoes carried by one of said parts; a compressible resilienttransmitting member located be-x tween the driving and driven members,the faces of the shoes being eccentric to the transmitting member; andmeans for moving said shoes into contact with the transmittin' member sothat the power itself will e ect the clutching of the parts.

5. The combination in a power transmis sion, of a drivingmember; aresilient body forming the transmitting member; a carrier hub; two ormore shoes pivotally mounted on the carrier hub, all shoes arranged tocome uniformlyin contact with the surface of the resilient body; andyielding-means tending to move the shoes into contact with the'resilientbody; and means-for retracting the shoes.

6. The combination in a power transmission, of a driving member; aresilient body forming a transmitting member; a carrier hub; two or moreshoes pivotally mounted on the carrier hub, all shoes arranged topositively come uniformly in contact with the surface sion, of a drivingmember; a floating transmitting member housed therein; a shaft on whichthe driving member is. mounted loosely; a" carrier hub forming thedrivenmember, said carrier hubihavingstuds; shoes pivotally mounted onthe studs and having a bearing face arranged to come in contact whenprojected with the surface of I the transmitting member; yielding meansfor moving the, shoes into contact with the' transmitting member; andpositive means for withdrawing the shoes from contact with said member.'

8. The combination in a power transmis sion, of a driving member; anannular transmitting member located in the driving member; a drivenmember'consisting of a hub; a shaft on which the hub is mounted;

studsprojecting from the hub; a shoe pivotally mounted on each stud andhaving an eccentric bearing surface arranged to come in. contact withthe surface of the transmitting member; a compensating rin .mounted onthe hub and engaging the s oes; and

means for moving the ring to allow the shoes to come into uniformcontact with the surface of the transmitting member, or unlformly .towithdraw the shoes from said transmitting member.

9. The combinatlon in a power transmlssion, of a shaft; a drivingelement loosely mounted on the shaft; an internal transmitting memberarranged to float-therein; a carrier hub, also mounted on the shaft;

shoes pivoted to the carrier hub, said shoes having bearing faceseccentric to thetrans mitting member; means for projecting the bearingfaces of the shoes aga nst the transmitting member; and means forpositively retracting the shoes.

10. The combination of a" driving member and a driven member; acompressible; resilient floating member capable of being depressed;shoes formed to cause an increasing impinging action .upon the transmit:ting member; and means for moving the shoes to and from the transmittingmember.

11. The combination of a driving member.

and a driven member; a loose cushioned friction ring formin atransmitting member; and shoes carrie by the driven member whose bearingfaces are arranged eccentric to the friction ring; and means for movingsaid shoes inthe path ofthe friction ring.

12. The combination of a driving member and a driven member; an annularfloating, yieldable transmitting member located between the two parts;and means, on one of said parts, for progressively deforming one surfaceof said transmitting member to conmeet it operatively with the drivingand driven members.

13. The combination of a driving member; a driven member; shoes carriedby one of said members; a floating, transmitting member located betweenthe shoes and the. other member; and means for moving said shoes intoand out of contact with said 10 transmitting member, the shoes beingtapered to be drawn into the power transmittmg member by the action ofthe driv- -ing member to connect the said members operatively.

14. An annular, floating transmitting member for a power transmittingapparatus consisting of a compressible resilient core and wearing faces.

DAVID LAKE.

